ADS6125: RF transformers

Hi,

That depends on what you wish to do.  there is no transformer that would have the specifications to satisfy everybody's requirements.  Those two transformers mentioned are not recommendations so much as a possible solution.  There are many different transformers on the market to choose from.  Each one will have on the datasheet for that transformer a minimum and a maximum frequency for the passband, usually measured at a -3dB point.  There may also be specifications for amplitude and phase balance over frequency.  And finally there will be the impedance ratio from primary to secondary.   A 1:1 impedance ratio transformer will have no voltage gain through it such as for the WBC1-1 that was mentioned.   A transformer with a 1:4 impedance ratio such as the TC4-1W will have a voltage gain of 2 through the transformer, should that be of value to your application.    The TC4-1W is rated for 3MHz through 800MHz for its -3dB passband.  The WBC1-1TL is rated for 0.25MHz through 750MHz, by comparison.  It all depends on what you need and what would work best for your application.

Regards,

Richard P.